Perceptive Informatics Announces Version 2.0 Release of its Clinical Trial Interactive Web Response System

Boston, MA , February 6, 2006 - Perceptive Informatics, Inc., a wholly-owned subsidiary of PAREXEL International Corporation (NASDAQ: PRXL), today announced the release of its Interactive Web Response System (IWRS) version 2.0. Perceptive's IWRS 2.0 integrates with its industry leading Interactive Voice Response System (IVRS) and is a sophisticated web interface for data capture, patient randomization and the management of study drug inventory for clinical trials.

"Perceptive started offering IWRS solutions to the bio/pharmaceutical industry over six years ago, and we are now bringing the next generation of capability to trial sponsors to help accelerate the clinical trial process and streamline trial management," said Todd A. Joron, Corporate Vice President and General Manager of Perceptive Informatics. "Sponsors could experience significant cost reduction and greater efficiencies in study management when IWRS is used to the fullest extent. Perceptive's goal is to help clients further streamline their clinical trial processes, reduce waste in clinical supplies and make inventory management more predictive and accurate."

Perceptive's IWRS version 2.0, offering a richer user environment and improved performance, is a single web application for reporting and interactive web response. Perceptive IWRS allows study teams to access real-time web reporting for all aspects of clinical trials tracking, thereby enhancing the ability of clinical teams to make real-time informed decisions about key components of their clinical trial. The system's interactive features include snapshots of project status as well as detailed study metrics, enabling trial monitors to follow progress of their sites, plan and prepare monitoring and to identify potential site issues, such as slow enrollment and high dropout rates. Sponsors can also aggregate data from multiple sources, such as Clinical Trial Management Systems (CTMS), data management, and enterprise resource planning systems, to provide a more comprehensive view of their clinical trials.

The Perceptive IWRS solution allows for seamless convergence between voice and web systems, and provides sophisticated tools for site recruitment and management as well as inventory management and clinical supplies forecasting. The system can be configured for patient screening, enrollment, randomization, compliance and electronic patient-reported outcomes (ePRO). The Perceptive IWRS is a fully validated system, which is in compliance with 21CFR Part 11 regulations and guidelines.

About Perceptive Informatics
Perceptive Informatics, Inc. combines clinical knowledge, quality and regulatory experience with advanced technology to decrease time to market, risk and cost associated with clinical trials. Perceptive's portfolio includes Medical Imaging, Clinical Trial Management Systems (CTMS), Interactive Voice Response Systems (IVRS) and Integration Services as well as web-based portal solutions, tracking tools, electronic diaries and investigator database solutions. Perceptive offers medical imaging services to rapidly and objectively assess the safety and efficacy of new drugs, biologics and medical devices in clinical trials. IMPACTT is Perceptive's market-leading CTMS product with 15,000 users worldwide and INITIATORT is a trial management product targeted to the needs of Phase I units.

About PAREXEL
PAREXEL International Corporation is a leading global bio/pharmaceutical services organization, providing a broad range of knowledge-based contract research, medical marketing and consulting services to the worldwide pharmaceutical, biotechnology and medical device industries. Committed to providing solutions that expedite time-to-market and peak-market penetration, PAREXEL has developed significant expertise across the development and commercialization continuum, from drug development and regulatory consulting to clinical pharmacology, clinical trials management, medical education and reimbursement. Perceptive Informatics, Inc., a subsidiary of PAREXEL, provides advanced technology solutions, including Medical Imaging, Clinical Trial Management Systems (CTMS), Interactive Voice Response Systems (IVRS) and Integration Services. Headquartered near Boston, Massachusetts, PAREXEL operates in 52 locations throughout 38 countries around the world, and has approximately 5,230 employees. For more information about PAREXEL International visit www.PAREXEL.com.

This release contains "forward-looking" statements regarding future results and events. For this purpose, any statements contained herein that are not statements of historical fact may be deemed forward-looking statements. Without limiting the foregoing, the words "believes", "anticipates", "plans", "expects", "intends", "appears", "estimates", "projects", "targets" and similar expressions are also intended to identify forward-looking statements. The forward-looking statements in this release involve a number of risks and uncertainties. The Company's actual future results may differ significantly from the results discussed in the forward-looking statements contained in this release. Important factors that might cause such a difference include, but are not limited to, risks associated with: actual operating performance; actual expense savings and other operating improvements resulting from recent restructurings; the loss, modification, or delay of contracts which would, among other things, adversely impact the Company's recognition of revenue included in backlog; the Company's dependence on certain industries and clients; the Company's ability to win new business, manage growth and costs, and attract and retain employees; the Company's ability to complete additional acquisitions and to integrate newly acquired businesses or enter into new lines of business; government regulation of the drug, medical device and biotechnology industry; consolidation within the pharmaceutical industry; competition within the biopharmaceutical services industry; the potential for significant liability to clients and third parties; the potential adverse impact of health care reform; and the effects of exchange rate fluctuations and other international economic, political, and other risks. Such factors and others are discussed more fully in the section entitled "Risk Factors" of the Company's Quarterly Report on Form 10-Q for the period ended September 30, 2005 as filed with the SEC on November 9, 2005, which "Risk Factors" discussion is incorporated by reference in this press release. The Company specifically disclaims any obligation to update these forward-looking statements in the future. These forward-looking statements should not be relied upon as representing the Company's estimates or views as of any date subsequent to the date of this press release.

PAREXEL is a registered trademark of PAREXEL International Corporation, and Perceptive Informatics is a trademark of Perceptive Informatics, Inc. All other names or marks may be registered trademarks or trademarks of their respective business and are hereby acknowledged.